The following processes are required for changing the medication on your own after circumcision surgery: 1. Wash your hands with flowing soapy water and wear medical gloves so that the probability of incision infection is reduced. 2. Remove the outer layer of elastic bandage and gauze. 3. use iodophor cotton balls to disinfect around the incision 3 times. 4. use sterile gauze and elastic bandage again. It should be noted that self-medication change must pay attention to the concept of asepsis, and it is necessary to seek help from medical personnel if there are obvious problems such as oozing blood or edema.